/Engine/Source/Runtime/MeshDescription/Public/MeshDescription.h
Adds a new edge to the mesh and returns its ID
[FEdgeID](API\Runtime\MeshDescription\FEdgeID) CreateEdge ( const [FVertexID](API\Runtime\MeshDescription\FVertexID) VertexID0, const [FVertexID](API\Runtime\MeshDescription\FVertexID) VertexID1 )